The Andromeda galaxy ... isn’t visible without powerful telescopes is the swarm of dwarf galaxies surrounding it—smaller galaxies orbiting Andromeda, much like the Moon orbits Earth.

Enjoy dark skies for evening observing, then catch a meteor shower and a planetary conjunction in the morning sky this week.

The embedded variable stars proved that the Andromeda nebula was much farther away than the stars that comprised the Milky Way. Andromeda was therefore a separate galaxy — similar to ...

Tromso sits at the centre of the northern lights’ oval, meaning that the lights can be visible even when activity is low.

Catch two transits of Io, spot sparkling star clusters, and view Mars at aphelion while the April Full Moon lights the sky ...

(gentle music) (waves crashing) (owl hooting) "There is no light in earth or heaven but the cold ... (chuckles) - Now when you look at the Andromeda Galaxy, you're looking 3 million years back ...

Hubble took a plate of the Andromeda Galaxy (Messier 31 ... which showed stars in spiral galaxies move far faster around the galaxy’s center than visible matter alone can explain. While we still don’t ...

In January 1925, at a meeting of the American Astronomical Society, a colleague presented a paper on his behalf that made a groundbreaking claim: the Andromeda ... the farther away a galaxy was, the ...

The Andromeda galaxy is surrounded by a constellation of dwarf galaxies that are arranged in a highly lopsided manner. Analysis of cosmological simulations published in Nature Astronomy reveal that ...